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针对不锈钢穿孔等离子弧焊过程，熔池小孔的特征行为与弧光光谱辐射强度之间的关系进行了光谱试验研究。随着小孔的形成与闭合，弧光光谱辐射强度产生了形似于负脉冲信号的显著跃变，该跃变信号对于预测小孔的形成和闭合是极为有利的，而且通过检测敏感谱线的辐射强度可以优化传感信号品质。
Aiming at the relationship between the characteristic behavior of stainless steel perforated plasma arc welding process and the small holes in the molten pool and the radiant intensity of the arc spectrum, a spectral experiment was carried out. With the formation and closure of the pinholes, the radiant spectral radiance produces a significant jump in shape resembling a negative pulse signal that is extremely beneficial for predicting the formation and closure of pinholes, and by detecting radiation from sensitive lines Intensity can optimize the quality of the sensing signal.